package ch03.demo.proxy;

import org.apache.log4j.Logger;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;


public class IntermediaryInvocationHandler implements InvocationHandler {
    private Logger logger=Logger.getLogger(IllegalMonitorStateException.class);

    /**
     * 被代理的目标对象，即其内部包含有对真实主题的引用
     */
    private Object target;
    public void setTarget(Object target){
        this.target=target;
    }

    /**
     * 为被代理的接口方法定义的代理业务规则
     * @param proxy the proxy instance that the method was invoked on
     *
     * @param method the {@code Method} instance corresponding to
     * the interface method invoked on the proxy instance.  The declaring
     * class of the {@code Method} object will be the interface that
     * the method was declared in, which may be a superinterface of the
     * proxy interface that the proxy class inherits the method through.
     *
     * @param args an array of objects containing the values of the
     * arguments passed in the method invocation on the proxy instance,
     * or {@code null} if interface method takes no arguments.
     * Arguments of primitive types are wrapped in instances of the
     * appropriate primitive wrapper class, such as
     * {@code java.lang.Integer} or {@code java.lang.Boolean}.
     *
     * @return
     * @throws Throwable
     */

    @Override
    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
        before();
        Object feedback=method.invoke(target,args);
        after();
        return "看房记录:买家反馈“"+feedback+"”";
    }
    public void before(){
        logger.debug("前期准备");
        logger.debug("查找房源");
        logger.debug("和卖家沟通时间");
    }
    public void after(){
        logger.debug("后期跟踪");
        logger.debug("和买家沟通意见");
    }
}
